Reduce Scrapping and Smelting, Promote Component Reuse > Complete Machines
> 1920 1940
> Cook County
> New ~~ 0-.50" micrometer linear stage daedal CR4052 -- --
New ~~ 0-.50" micrometer linear stage daedal CR4052 -- --
Micrometer 0-.5 cross roller positioning stage,
Brand New. (I had to replace with Metric unit)
About Crossed Roller Positioners
Parker Daedal crossed roller positioners combine a crossed roller slide with a drive mechanism. The crossed roller slide is spring loaded against the drive mechanism to provide a constant preload between the drive and the slide. These positioners are available with a number of different drive mechanisms including fine adjustment screw, differential screw, imperial and metric micrometer heads, and digital micrometer heads. The crossed roller bearing system is composed of two rows of rollers. Each roller is alternately crossed at 90 with the next and captured in V grooves, located on the base and top. Since rollers provide a larger (line) contact surface than ball bearings, a crossed roller positioner has higher load carrying capability than a ball bearing positioner of comparable size. These changes also significantly increase the stiffness by increasing the contact area of each bearing. Crossed roller positioners are preloaded to eliminate any side play and to provide a uniform coefficient of friction. Crossed roller positioners are constructed of corrosionresistant black anodized aluminum and high carbon steel. Members are precision machined to assure flatness and parallelism for both top and bottom mounting surfaces. Crossed roller positioners are available in imperial and metric mounting configurations depending on model selection.
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